The Summer Rental - Part 7

Click here to read the previous parts of the story.

It was early - the sun had barely risen - so Christian was surprised when he heard someone else join him on the deck. He looked back to see his sister step out with a mug in her hand and a smile on her face.

"Good morning," he said.

"Good morning," Marie replied as she sat in the chair next to him, crossed her leg, and looked out over the lake as she took a sip of her coffee.

Just a scant handful of hours ago they'd both participated in a foursome with their spouses. They hadn't talked about it afterwards as they'd all gone to their bedrooms after a few hours of blissful play had left everyone thoroughly satisfied. In the aftermath of that, Christian felt a little awkward sitting next to his sister. He couldn't quite get the image of Marie spitting a load of her husband’s cum into Christian’s mouth or licking Ruby's pussy out of his head and he wondered if she couldn't help but think of him doing the same thing.

"So," Marie said after a lengthy silence passed between them. "Last night was...I don't know, unexpected, I guess."

Christian laughed and very nearly spilled his coffee in doing so. "That's one way of putting it," he said. "Another way to put it, I suppose, is that we discovered that we're remarkably similar."

Marie's gaze remained focused on the lake as she replied, "That's certainly accurate, isn't it?"

"How long have you known...well, that you're interested in the sort of thing that happened last night?" Christian asked.

"A long time, actually," Marie answered. "I kept it to myself for years. It's a strange thing to fantasize about and I wasn't sure how Adam would respond. Plus, I wasn't actually sure I wanted it to be a real thing. It felt safer just keeping it as a fantasy, you know?"

"I can understand that," Christian replied.

"Then my husband found his way to your wife...into your wife, really, and my fantasy became reality without me even knowing it. At first, at least," Marie said. "I should have been angrier when I found out, and I was kind of angry, but there was also the, well, the arousal. It was just so significant, you know? I could have held onto that anger and let it grow, but then I would have given up experiencing what has turned out to be a really beautiful addition to our sex life. In a way, it's reinvigorated our marriage."

"I know," Christian said as he smiled and looked at his sister. "I mean, it's reinvigorated mine, too. There's just something so exciting about it. In a way I can't really explain."

Marie returned his smile and reached out to grab his hand and give it a gentle squeeze. "I know it's kind of strange on the surface, given what's brought us together on this vacation, but I've never felt closer to you."

Christian felt the same way, though there was no doubt Marie was correct about it being strange. They hadn't done anything inappropriate together, but he'd been involved in a very intimate situation with his sister and there was no question that was unusual.

"I agree," he said after a brief pause. "On both counts, I suppose. It is kind of strange and I do feel closer to you. In the best way possible."

Marie squeezed his hand again and let it go before turning her attention back to the lake. The light of the rising sun was now reflected in the water and the forested hills behind it and it looked remarkably beautiful.

"Is it strange to watch me go down on Ruby?" Marie asked.

"No," Christian answered without hesitation. "Is it strange that it's not strange?"

Marie laughed softly. "I suppose this whole thing is a little strange, isn't it? Or at least it would be really, really strange to someone else. I mean, I can't think of a single friend of mine that wouldn't find it really odd that I'd had a foursome with my husband, my brother, and my sister-in-law last night."

"No, I can't either," Christian admitted with a laugh. "It doesn't bother me that it's strange, though. In fact, if we're being totally honest with each other, the...I don't know, taboo nature of it all I think makes it more exciting."

Marie uncrossed and crossed her legs once more, shifted in her seat, and looked at Christian with a decidedly naughty smile on her face, almost as if she was indulging in a particularly arousing memory in that moment. "I know," she said. "There's something so irresistible about that. The first time Adam had me clean Ruby's pussy...it was just so...so kinky, so naughty, so wild. I very nearly came from the act itself. I wasn't even playing with myself. I was just so turned on from the taboo nature of it, like you said."

Christian was quite certain he was witnessing his sister in the throes of an ever-increasing level of arousal and he found it surprisingly intriguing. He couldn't help but feel a bit of that desire himself as he replayed Marie's worshipful pussy licking and cocksucking from the night before as she did everything in her power to serve her husband and sister-in-law. In some ways, Christian was a little jealous that Marie had gotten to do so much more than him.

"The first time I discovered them was when I went out to get firewood from the shed at Christmas. Ruby was giving Adam a blowjob in the shed and she wasn't shy about telling him how much she enjoyed it and how badly she wanted him to cum in her mouth," Christian explained. "There was something about the boldness of blowing her brother-in-law - a family member, really - that I remember finding so thrilling. It was the first of many hugely exciting discoveries during our time at mom and dad's house."

For a short while, neither of them said anything as they both looked out at the lake and watched the light of the rising sun shifted over the water and the trees.

Marie broke the silence when she said, "I didn't think I'd like eating pussy. I'd never done it before. I've discovered that I would have enjoyed doing simply because it's what Adam wanted - I'm a bit of a submissive in that way, as it turns out - but I actually really like it. I like how it tastes. I like how it feels against my tongue. I like doing it even when I'm not cleaning Adam's cum from Ruby, though I suppose that's at least in part because it's a real turn on to prepare her pussy for him."

Christian wasn't sure what to say, in part because he was awed at what Marie was willing to share and in part because he felt a little jealous that she got to participate so directly in the fun Ruby and Adam were having.

"Did you like watching me suck Adam's cock to get him nice and hard for your wife's pussy?" Marie asked.

Christian was a little bit stunned that his sister had just asked that question, and yet it was clear that Marie wasn't the same person he'd always thought she was, just like he wasn't the same person she no doubt thought he was.

An answer came to mind immediately, though Christian held onto it for a few moments as he wondered where his sister was going with her line of questioning.

"Yes," he replied. It felt strange to admit that he'd enjoyed watching his sister suck cock, but he had.

"And did you enjoy watching me suck Adam's balls while your wife rode his cock?" Marie asked.

Christian nodded.

"And did you enjoy joining me on your knees and licking Ruby's clit while Adam's cock was buried deep inside her?" Marie asked.

"Yes," Christian answered.

Marie uncrossed her legs and placed a hand on her inner thigh. Christian half expected to see his sister indulge in a bit of over-the-clothes masturbation, but she declined to do so before asking, "And did you enjoy the taste of your brother-in-law's cock on your tongue, Christian? Did you enjoy how hard he felt as you licked him and Ruby's throbbing clit?"

Christian wasn't sure anyone had noticed that he'd been unable to avoid licking a little bit of Adam's cock while using his tongue to pleasure Ruby's clit. Marie had clearly noticed and he suspected that meant everyone else knew, too. The answer was the same, though, and he actually felt a little bit thrilled at the idea that other people knew he'd come into contact with his brother-in-law's cock. "Yes, I did," he admitted.

"You know what I enjoyed, Christian?" Marie asked as her fingers moved between her legs.

He stared at his sister's crotch and the way her fingers gently pressed against her jeans in an apparent attempt to pleasure herself and said, "Please, tell me."

Marie moaned softly and replied, "I enjoyed sharing my husband's cum with you. I enjoyed spitting it into your mouth. I enjoyed how utterly filthy that was. I don't know why, but it turned me on like few things ever have, Christian. I enjoyed doing what I was told - what your wife told me to do. I enjoyed the fact that she wanted me to do it, that she wanted to see her husband and his sister share in the beautiful taste of Adam's cum. It made me so wet, Christian, and it ensured that the orgasm I had a little later was truly body shaking. Did you enjoy that moment?"

"Yes, I did," Christian admitted.

Marie set her mug on the deck, unbuttoned her jeans, and pushed a hand into them. She closed her eyes, arched her back, and masturbated in front of Christian, doing so without hesitation or any sense of shame.

"You know what would turn me on?" Marie asked.

"No. Please, tell me," Christian said as he felt his cock get hard from the wild nature of what was unfolding on the deck.

"If you helped me prepare them both the next time they fuck, Christian," Marie said. "If you got on your knees with me. If we ate your wife's pussy together. If we sucked on her labia and licked her clit and put our tongues deep in her cunt. If you...if you sucked Adam's cock with me. If you sucked his balls with me. If you made sure he was hard and slick with our spit. If we put him inside your wife together. If we served them together and then watched them have beautiful sex...the kind of sex we can't provide them...the kind of sex they only seem to be able to have with each other."

It wasn't Marie's desire that stunned Christian, for he found the notion just as arousing as she did. It was her willingness to give voice to it that surprise him, but it seemed that he continued to underestimate just how kinky Marie was.

"Will you do that with me, Christian? Will you eat pussy with me? Will you suck cock with me?" Marie asked.

"Yes," Christian answered. "I'll eat pussy with you. I'll...I'll suck...I'll suck cock with you, Marie."

Marie closed her eyes tightly, bit her lower lip, arched her back, and experienced what looked to be a mind-bendingly strong orgasm. Her feet kicked out and her legs trembled for a few moments before she unleashed a long, low moan that signified a deep level of pleasure.

She pulled her hand from her panties, buttoned her jeans back up, and retrieved her coffee mug from the deck. She took a sip, smiled brightly, and turned to Christian and said, "I'm going to hold you to that, and I'm going to do what I can to make sure it happens as quickly as possible. As it turns out, I'm not the kind of woman that enjoys waiting to claim the pleasure she craves. Did you mean what you said?"

"Yes," Christian admitted. Marie had just had an orgasm, but he hadn't. His body was still flooded with desire and that meant he was more than happy to go all in and fulfill the promise he'd made.

"Good. What do you say we go inside and make breakfast for our spouses? We'll lure them out of bed with the smell of bacon, we'll feed them well. Then maybe we'll go for a hike to help the food digest before we come back home and show them how eager we are to help them have the sex they crave," Marie suggested.

"That sounds amazing," Christian replied. It sounded crazy, too, but he wasn't going to let that stop him from pursuing something that sounded so wildly, wonderfully pleasurable.

Marie stood, took his hand, and said, "Let's go."

Christian stood, followed her in the house, and got busy preparing breakfast for their spouses as his body swirled with arousal while he imagined the intense pleasure that would soon be his to enjoy.